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Title: On-line process control monitoring system

Abstract

An on-line, fiber-optic based apparatus for monitoring the concentration of a chemical substance at a plurality of locations in a chemical processing system comprises a plurality of probes, each of which is at a different location in the system, a light source, optic fibers for carrying light to and from the probes, a multiplexer for switching light from the source from one probe to the next in series, a diode array spectrophotometer for producing a spectrum from the light received from the probes, and a computer programmed to analyze the spectra so produced. The probes allow the light to pass through the chemical substance so that a portion of the light is absorbed before being returned to the multiplexer. A standard and a reference cell are included for data validation and error checking.

Inventors:
 [1];  [2];  [3]
  1. Martinez, GA
  2. Aiken, SC
  3. Augusta, GA
Issue Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States)
OSTI Identifier:
868394
Patent Number(s):
5131746
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
on-line; process; control; monitoring; fiber-optic; based; apparatus; concentration; chemical; substance; plurality; locations; processing; comprises; probes; location; light; source; optic; fibers; carrying; multiplexer; switching; probe; series; diode; array; spectrophotometer; producing; spectrum; received; computer; programmed; analyze; spectra; produced; allow; pass; portion; absorbed; returned; standard; reference; cell; included; data; validation; error; checking; reference cell; process control; optic fiber; light source; diode array; chemical substance; chemical processing; optic fibers; chemical process; carrying light; based apparatus; optic based; on-line process; /356/

Citation Formats

O'Rourke, Patrick E, Van Hare, David R, and Prather, William S. On-line process control monitoring system. United States: N. p., 1992. Web.
O'Rourke, Patrick E, Van Hare, David R, & Prather, William S. On-line process control monitoring system. United States.
O'Rourke, Patrick E, Van Hare, David R, and Prather, William S. Wed . "On-line process control monitoring system". United States. https://www.osti.gov/servlets/purl/868394.
@article{osti_868394,
title = {On-line process control monitoring system},
author = {O'Rourke, Patrick E and Van Hare, David R and Prather, William S},
abstractNote = {An on-line, fiber-optic based apparatus for monitoring the concentration of a chemical substance at a plurality of locations in a chemical processing system comprises a plurality of probes, each of which is at a different location in the system, a light source, optic fibers for carrying light to and from the probes, a multiplexer for switching light from the source from one probe to the next in series, a diode array spectrophotometer for producing a spectrum from the light received from the probes, and a computer programmed to analyze the spectra so produced. The probes allow the light to pass through the chemical substance so that a portion of the light is absorbed before being returned to the multiplexer. A standard and a reference cell are included for data validation and error checking.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

Patent:

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